Coating metal sheets.



G. RUSSELL.

v GOATING METAL SHEETS.

APPLICATION FILED AUG. 5, 1909.

Patented Aug. 13, 1912.

:mamon wrr'NEssss UNITED sTATEs PATENT oEErcE.

GEORGE RUSSELL, F MGKEESPRT, PENNSYLVANIA, ASSIGNOR TO PITTSBURG CAN COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION 0F PENNSYLVANIA.

COATING METAL SHEETS.

Specification of Letters Patent. M Patented Allg. 13, 1912 Application filed August 5, 1909. Serial No. 511,464.

To all whom it may concern:

Be itrknown that I, GEORGE RUSSELL, a resident of McKeesport, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Coating Metal Sheets; and I do hereby vde- L ing. I

As illustrated in the drawings, 1 repre.

Clare-the following to be a full, clear, and exact description thereof.

^ AMy inventionv relates to coating metal sheets, and has special reference to thin metal sheets, such as tin, black iron or other sheets which are to be coated with enamel,

tion and combination of parts of the appa-A ratus for` carrying out such process, as hereinafter more specifically set forth and described, and particularly pointed out in the claims.

'Io enable others skilled in the art to which my invention appertains vto practise my improved process and construct and use my. improved machine for coating metal sheets, I will describe the same more fully, referring to the accompanying drawing, in

- which- Figure 1 shows a -longitudinal sectional view of the machine for coating metal sheets, and showing in full lines the means for han- .dling and supporting the sheets after being coated. Fig. 2 is a vertical cross section on the line 2 2, Fig. 1, looking in thedirection of the arrow.

Like symbols of reference herein indicate like parts in each of the figures of the drawsents the bed of the machine, which 'has Suitable racks or frames and then the plates are mounted on shafts 3 journaled in saidr frame, and are in vertical line with each other` The lower roll 3'is adapted to'travel within awrecepta'cle-or tank 4 on the bed 1, and such tank is adapted to contain a cleansing material 5, such as water, gasolene or other suitable cleansing compound or liquid.

vIntermediate of the ends of the-frame 2 and within the same are the swabbing rolls 6,

which aremounted on shafts 6.journaled in Vsaid frame and are in vertical lineawith each other. At the rear end of the frame 2 and within the same are the two polishing rolls 7, which are mounted on shafts 7 and are in vertical line with each other. K

Between the rolls 3 and 6v are the two drivingrollers 8 which are mounted on the shafts 8 `journaled in the frame 2, and are in vertical line with each other, and between the `rolls 6 and 7 are the driving rollers 9, which are mounted on shafts 9 linewith each other.V Beyond the rolls 7 and at the rear lend of the frame 2 are the driving rollers l0, which are mounted on lshafts 10 journaled in said frame, and are in vertical line with each otherF Each of the rolls 3, rolls 6, and rolls 7, are connected together byv the two gear wheels 12, which are mounted on the respective shafts ofsaid rolls, exteriorly of one side of the frame- 2, and are adapted to mesh Vwith each other, as lshown in Fig-2, and each .of the driving rollers 8, 9 and 10 are connected to each other by the two pinions 13 mounted on the respective shafts of these rolls and exteriorly of one side of vthe frame2, for meshing with each other, as shown in/Fig. 2. The lower rolls 3,-6 and 7, and the lower driving rollers "8, 9 and 10 are operated by suitable connections 14, preferably of the sprocket wheel and chain type, as shown dia-grammatically in dotted lines Fig. 1 and driven from the driving shaft 6 of the lower swabbing roll 6. rIhis shaft 6 is provided With a pulley 15, such as is shown in Fig. 2, and connected to any suitable source of power in the usual manner, so that the rolls 3, 6 and 7, yand rollers 8, 9 and 10, will be revolved inf the direction of the arrows Shown in Fi 1, through the gears l2 on the shafts 8', 6 and 7 pinions l13 on shaftsvS, 9 and 10', andthe connections 14, and preferably said rolls 6 and 7 lwill be revolved at `a faster speed than said journaled in saidframe and are in vertical' 1 in a vertical line on the shafts 16 and journaled in the housings or standards 17 extending vertically up from the bed l.'

lThese rolls 16 are operated through suitable connection, (not shown), which are connected to, or operated by, any suitable source of power, and they will revolve in the same direction as the other rolls and rollers previously described, as indicated by the arrows in Fig. 1. Under the lower -roll 16 is a receptacle or tank 18, which is adapted to contain any suitable coating material 19 for being fed to said lower roll, and this pan has a well 18 at one end of the same to receive the gravimeter in testing the specific gravity of the enameling or other compound within the tank.

Between the driving rollers 10 and coating rolls 16 are the two dat nozzles 20, which are in vertical line with each other for being in position on each side of the sheet passing between the same, as hereinafter' described, and are connected by a pipe 21 leading from any suitable'air blast (not shown), while suchblast is controlled by a valve 22 on the said pipe.

` The -rolls 6 and 7 are covered or faced with a suitable surfacing material, as at 23, while the rolls 3 and 16` are formed of a composition of glue and other materials, such asemployed for printing rolls to form themselves soft and yielding, and such rolls 16 are of sufcient size or diameter to permit the entire surface of the sheetv or plate to be coated at one revolution of the saine. With one revolut-ion of the lower roll 16 through the coating material 19 in the tank 18,' the upper roll 16 will receive thesaid material frointhe lower roll over its entire face from said lower wall in such a like revolution through its contacting therewith, and thereby enable the coating of the entire sheet or plate whenit is afterward passed between the same, as hereinafter described.

With the the arrows' inhig. 1, the lower roll 3 in being revolved through the cleansing material 5 in the tank l will convey such material to the upperroll 3 in its revolution, and the sheet or passed between said rolls 3` where it is cleansed or washed on both sides, and then it is caught by the driving rollers8. After it is caught by the driving rollers 8, the plate a is passed between and through the same and reaches the swabbing'rolls 6 where it is dried on both sides in passing through and between the' same. In passing through and between the swabbing rolls 6, the plate a parts operating as indicated by' late a to be coated isr tween the polishing rolls 7, it is caught by the driving rollers 10 and passes throng and between thesame to the coating rolls 16. After passing through the driving rollers 10 to the coating rolls 16, the plate apasses between the nozzles 20 where it receives an air blast on each side of the same through said nozzles from the supply pipe 21, so that all dirt, threads or any other material is blown 0H' from said plate to clear the surfaces of the same of foreign particles before passing to said coating rolls.

'lhe plate a-in passing through the coating rolls 16 has a coating applied to each side of the same by said rolls through the lower roll 16 passing through the coating material 19 in the tank' 18, and this coating material having been previously supplied from the said lower roll tothe upper roll 16.

When each plate a has passed througl'il the coating rolls 16, it is placed upon a rack or frame 24, and then each of such frames carrying plates are piled upon the bed 25' of a truck 25, which is mounted upon wheels 26. When aY sucient "number of these coated plates a are thus placed in the truck 25, it is moved to a drying oven or other suitable place, and such plates allowed to bake or dry in the usual manner.

lt will thus be seen that my improved machine for coating metal sheets or'plat/es will be cheap, simple 'and ecient in its construction and operation, and will enable the plates or sheets to be free fronrdirt, threads and other particles before being passed to the coating device, while the cleaning and polishing of such sheets or platesl before being coated will form a bright and polished surface on the same, and thereby presentan unusual highly colored and hnished article when the same is coated. By reason of the sheets or plates receiving the air blast aft/er leaving the polishing device any threads, dirtjor other particles on or adhering thereto in or after passing through the rolls. or rollersv are removed before such sheets or plates enter the coating device and thereby enable the same to have perfectly clean and` smoother surfaces thereon fo-r the coating of thesheets or plates. The

planishing or polishing is for'the purpose izo f ers, cleaning, drying and polishing rolls can be operated separately or together, or with the coat-ing rolls or separated therefi-oin, as desired.

After the sheets or plates are coated they will be free from any moving or scratching of the saine in handling on the device for supporting the same so \that such coated surfaces thereon when baked or dried will present a smooth and perfect appearance to the eye and for marketing.

.Various modifications and changes in my improved process and in the design and construction of the various parts of my improved machine for coating sheets may be resorted to Without departin from the spirit of the invention or sacrificing any of its advantages.

What I claim as my invention and desire to secure by Letters Patent, is A 1. In apparatus for coating met-al sheets or plates, the combination of a coating device, mechanisms for cleaning, drying and polishing the sheets or plates before being coated, and an air blast pipe having Hattened nozzles connected thereto for clearing the, surfaces of the sheets or plates after polishing and before being coated.

2. In apparatus for coating metal sheets 3. The herein described process of coating metal sheets or plates, which consists in cleaning the sheet or plate, then planishiii'g the sheet or plate wliile in a cold state, and then coating the same.

4. The herein described process of coating metal sheets or plates, consisting in cleaning, drying, then planishing the sheet or plate While in a cold state, and then coating the saine. 5. The herein described process of coating metal sheets or plates, consisting in cleaning, drying, then planishing the sheet. or plate while iii a cold state, then clearingl the same, and then 'coating the same.

ln testimony wliereot', l, the said GEORGE RUSSELL, have hereunto set my hand.

GEORGE RUSSELL.

Witnesses GERTRUDE IuuiMER,

J. N. COOKE. 

